<template>
  <div class="permission-container">
    <div class="app-container">
      <!-- 表格 -->
      <el-card>
        <div style="text-align: right; margin-bottom: 20px">
          <el-button type="primary" size="small" @click="hAdd(1,'0')">>添加权限</el-button>
        </div>
        <el-table border :data="permissionsList" row-key="id">
          <el-table-column label="名称" prop="name" />
          <el-table-column label="标识" prop="code" />
          <el-table-column label="描述" prop="description" />
          <el-table-column label="操作">
            <template #default="{ row }">
              <el-button v-if="row.type === 1" type="text" @click="hAdd(2,row.id)">添加</el-button>
              <el-button type="text" @click="hEdit(row.id)">编辑</el-button>
              <el-button type="text" @click="hDel(row.id)">删除</el-button>
            </template>
          </el-table-column>
        </el-table>
      </el-card>
      <el-dialog :visible.sync="showDialog" :title="isEdit?'编辑':'添加'" @close="resetForm">
        <!-- 表单内容 -->
        <el-form ref="form" label-width="100px" :model="formData" :rules="rules">
          <el-form-item label="权限名称" prop="name">
            <el-input v-model="formData.name" />
          </el-form-item>
          <el-form-item label="权限标识" prop="code">
            <el-input v-model="formData.code" />
          </el-form-item>
          <el-form-item label="权限描述" prop="description">
            <el-input v-model="formData.description" />
          </el-form-item>
          <el-form-item label="权限启用" prop="enVisible">
            <el-switch
              v-model="formData.enVisible"
              active-text="启用"
              active-value="1"
              inactive-text="不启用"
              inactive-value="0"
            />
          </el-form-item>
        </el-form>

        <template #footer>
          <div style="text-align: right;">
            <el-button @click="showDialog = false">取消</el-button>
            <el-button type="primary" @click="hSubmit">确定</el-button>
          </div>
        </template>
      </el-dialog>
    </div>
  </div>
</template>

<script>
import { getPermissionList, addPermission, delPermission, updatePermission, getPermissionDetail } from '@/api/permissions'
import { tranListToTreeData } from '@/utils'

export default {
  name: 'Permissions',
  data() {
    // 判断权限名称同级不能重复
    const validateName = (rule, value, callback) => {
      // 判断逻辑,找到当前部门的所有子部门,将所有子部门的名称取出得到被占用的列表
      let existNameList = this.originList.filter(item => item.pid === this.formData.pid).map(item => item.name)
      if (this.isEdit) {
        existNameList = this.originList.filter(item => item.pid === this.formData.pid && item.id !== this.formData.id).map(item => item.name)
      }
      console.log(existNameList)
      existNameList.includes(value) ? callback('权限名不能重复!') : callback()
    }
    // 判断权限标识不能重复
    const validateCode = (rule, value, callback) => {
      // 判断逻辑,找到所有部门将权限标识取出得到被占用的权限标识
      let existCodeList = this.originList.map(item => item.code)
      if (this.isEdit) {
        existCodeList = this.originList.filter(item => item.id !== this.formData.id).map(item => item.code)
      }
      console.log(existCodeList)
      existCodeList.includes(value) ? callback('权限标识不能重复!') : callback()
    }
    return {
      permissionsList: [], //  存储权限信息
      showDialog: false, // 是否显示弹层
      formData: {
        name: '', // 名称
        code: '', // 权限标识
        description: '', // 描述
        enVisible: '0', // 开启
        pid: '', // 添加到哪个节点下
        type: '' // 类型
      },
      rules: {
        name: [
          { message: '不能为空', required: true, trigger: 'blur' },
          { validator: validateName, trigger: 'blur' }
        ],
        code: [
          { message: '不能为空', required: true, trigger: 'blur' },
          { validator: validateCode, trigger: 'blur' }
        ],
        description: []
      },
      originList: [], // 存储做校验时的数据
      isEdit: false // 控制弹层是添加还是编辑
    }
  },
  created() {
    this.loadPermissionList()
  },
  methods: {
    // 获取所有权限点信息
    async loadPermissionList() {
      try {
        const res = await getPermissionList()
        // console.log(res)
        this.originList = res.data.map(({ name, code, id, pid }) => ({ name, code, id, pid }))
        // 将数据转换成树形结构
        this.permissionsList = tranListToTreeData(res.data)
        // console.log(this.permissionsList)
        console.log(this.originList)
      } catch (error) {
        console.log(error)
      }
    },

    // 点击确定
    hSubmit() {
      // this.$refs.form.validate(valid => {
      //   if (valid) {
      // 做添加 或者 编辑
      this.isEdit ? this.doEdit() : this.doAdd()
      //   }
      // })
    },

    // 点击添加
    hAdd(type, id) {
      this.isEdit = false
      this.showDialog = true
      // 记录当前添加的关键信息
      this.formData.type = type
      this.formData.pid = id
    },

    // 添加申请
    async doAdd() {
      try {
        const res = await addPermission(this.formData)
        console.log(res)

        this.showDialog = false
        this.loadPermissionList()
        this.$message.success('添加成功')
      } catch (err) {
        console.log(err)
        this.$message.error('添加失败')
      }
    },

    // 当弹层关闭时，重置表单
    resetForm() {
      // 1. 重置表单
      this.formData = {
        name: '', // 名称
        code: '', // 权限标识
        description: '', // 描述
        enVisible: '0', // 开启
        pid: '', // 添加到哪个节点下
        type: '' // 类型
      }
      // 2. 清空校验
      this.$refs.form.resetFields()
    },

    // 用户点击删除
    hDel(id) {
      this.$confirm('此操作将永久删除该权限, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).then(() => {
        this.doDel(id)
      }).catch(() => {
        this.$message({
          type: 'info',
          message: '已取消删除'
        })
      })
    },

    // 删除申请
    async doDel(id) {
      try {
        const res = await delPermission(id)
        console.log(res)

        this.loadPermissionList()
        this.$message.success('删除成功')
      } catch (err) {
        console.log(err)
        this.$message.error('删除失败')
      }
    },

    // 用户点击了编辑
    async hEdit(id) {
      this.isEdit = true
      // alert(id)
      // 1. 根据id去获取详情
      const res = await getPermissionDetail(id)
      console.log('从后端返回的权限点详情数据是', res)
      // 2. 填充在表单中
      this.formData = res.data
      // 3. 显示弹层
      this.showDialog = true
    },

    // 编辑申请
    async doEdit() {
      try {
        const res = await updatePermission(this.formData)
        console.log(res)

        this.showDialog = false
        this.loadPermissionList()
        this.$message.success('修改成功')
      } catch (err) {
        console.log(err)
        this.$message.error('修改失败')
      }
    }
  }
}
</script>
